Andy,
Remember, that initially, CBM didn't buy the land behind the current 1st tee.
That purchase, 2.5 acres, I think, came later.
If he wanted more waterfront property, he could have purchased it.
But, you have to consider the terrain on the water, on the land to the West and South of the present 18th green.
It's certainly very pitched, very steep, hardly the land for golf.
In addtion, If CBM had continued further west, beyond the current 18th hole, how was he to get back to his special holes, the Alps and Redan, and then, back to his original 18th green. He couldn't, unless he was building a 27 hole golf course, which we know he wasn't interested in.
The water didn't hold the lure that we have today.
It was his holes that held his interest, not the views.
I find the 1903 New York State map very interesting in terms of clubhouse siting and the evolution of the 14th hole.
Macdonald stated that he found a better site, a better hole for the Eden than existed at TOC, due to the fact that a topped shot couldn't reach the green due to the presence of the intervening Sebonac Creek.
From there, it would appear that the tee for his Cape is immediately to the left of the Eden Green.
It has to be there, or perhaps a little further East, because that's where the water that the tee shot has to traverse is located.
So, my question, especially for George Bahto, is, where was the original green, relative to the current green ?